condition mean min max ZT0-3 23.126833333333334 12.723099999999999 30.159950000000002 ZT4-7 12.96415 12.96415 12.96415 ZT8-11 10.9315 10.9315 10.9315 ZT12-15 18.38055 14.361249999999998 22.39985 ZT16-19 22.42555 22.42555 22.42555 ZT20-23 33.104749999999996 33.104749999999996 33.104749999999996